Impulse Propagation in Complex Built-Up Structures - Towards an Efficient Solver for Time-dependent and Nonlinear Energy Propagation
Abstract
Modeling the propagation of vibrations within complex built-up structures such as cars, airplanes or rockets is a challenging task due to the multitude of transfer paths structure-borne sound can take and the complicated reflection laws at interfaces between substructures, at stiffeners or large bends in the structure. Recent progress in determining the transport of vibrational energy based through simulation is based on integral operator formulations for the flow of vibrational energy. The method Ð called Dynamical Energy Analysis (DEA) Ð makes it possible to compute stationary vibrational energy distributions in complex and large-scale engineering structures on competitive time-scales. In this project, we generalize this method to describe impuls propagation through mechanical structures - such as a short, localized excitation and subsequent distribution of the impact energy within the structure. The aim of the project is to use the DEA functionality to calculate the response of a structure to time-dependent, non-harmonic excitation leading to impulse propagation. We will to subsequently extend the method to be used for impact detection and we will including local nonlinear effects in the description. The algorithms will be implemented for computations on large scale built-up structures.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 12, 2017
- Source ID
- W911NF1510325
Entities
People
- Gregor Tanner
Organizations
- Army Contracting Command
- United States Army
- University of Nottingham